/**
 * global vars 
 */
#define WindowWidth 600 
#define WindowHeight 450 
string objFileName = "glass1_black.obj";
string instruction = "Use W S A D to control the glass: left-right AD , up-down WS\nPress c to save the scene to a bmp file\n";
/**
 *  global vars for models and viewpoint
 */
double xAngle=0,yAngle=0,zAngle=0;
ObjModel data;

